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<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    a:link {
      color: #000;
      text-decoration: none;
    }

    a:visited {
      color: aquamarine;
    }

    a:hover {
      color: blue;
      text-decoration: underline;
    }

    a:active {
      color: aquamarine
    }
  </style>

</head>

<body>
  <div>

    <a href="#">小猪</a>

  </div>

</body>

</html>